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31. Characterization of Tissue-Equivalent Materials for High-Frequency Applications (200 MHz to 20 GHz)
Series: Technical Note (NIST TN)
Report Number: 1554
Topic: Electromagnetics
Published: 7/1/2010
Authors: James R. Baker-Jarvis, Sung Kim, Luke Leschallinger, Justin Johnson, Brad Givot
Abstract: The purpose of this report is to summarize the characterization of a number of high-frequency solid, liquid, and semisolid tissue-equivalent materials, from 200 MHz to 20 GHz. Carbon black and liquid mixtures were studied, but were found to be uns ...

32. Behavior of {epsilon} (omega} and tan {delta} of a Class of Low-Loss Materials
Topic: Electromagnetics
Published: 6/18/2010
Authors: James R. Baker-Jarvis, Michael D Janezic, Billy F Riddle, Kim Sung
Abstract: In this project we study the behavior of the permittivity and loss tangent of a class of materials that exhibit relaxation. For relaxation response we show that the permittivity is a monotonically decreasing function of frequency. Also, for many lo ...

33. Simulator for Amplifier and Transistor Noise-Parameter Measurements
Topic: Electromagnetics
Published: 6/18/2010
Author: James Paul Randa
Abstract: This paper describes a simulation program that was developed to compare the uncertainties that would be expected with different measurement strategies for the noise parameters of connectorized amplifiers and of amplifiers or transistors on wafers. Bo ...

34. High-Frequency Dielectric Measurements: A Tutorial
Topic: Electromagnetics
Published: 4/1/2010
Authors: James R. Baker-Jarvis, Michael D Janezic, Donald C. DeGroot
Abstract: KNOWLEDGE of the response of materials to electromagnetic (EM) fields in the frequency range of radio frequency (RF) through terahertz (THz) is critical to numerous research projects and electronic product development activities. Electromagnetic wave ...

35. Broadband Characterization of Individual Platinum Nanowires
Topic: Electromagnetics
Published: 3/7/2010
Authors: Kichul Kim, Thomas M Wallis, Paul Rice, Chin J. Chiang, Atif Imtiaz, Pavel Kabos, Dejan Filipovic
Abstract: Conductivity and contact resistance of 100 nm and 250 nm diameter platinum (Pt) nanowires (NWs) are investigated computationally and experimentally. Finite element method based full-wave modeling and circuit simulations are used in conjunction with m ...

36. A Physical Explanation of Angle-Independent Behavior of Metafilms/Metasurfaces
Topic: Electromagnetics
Published: 1/6/2010
Authors: Joshua A Gordon, Christopher L Holloway

37. Progress Toward Corrugated Feed Horn Arrays in Silicon
Topic: Electromagnetics
Published: 12/16/2009
Authors: Joseph Wright Britton, Ki W. Yoon, James A Beall, Daniel Thomas Becker, Hsiao-Mei Cho, Gene C Hilton, Michael David Niemack, Kent D Irwin
Abstract: We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromac ...

38. Nonlinear calibration of polarimetric radar cross section systems
Topic: Electromagnetics
Published: 11/4/2009
Author: Lorant A. Muth
Abstract: Polarimetric radar cross section systems are characterized by polarimetric system parameters $\epsilon_h$ and $\epsilon_v$. These parameters can be obtained with the use of rotating dihedrals. The full polarimetric dataset as a function of the angl ...

39. Transport in Electromagnetic Metrology Based on Nonequilibrium Statistical Mechanics
Topic: Electromagnetics
Published: 11/3/2009
Authors: James R. Baker-Jarvis, Jack Thomas Surek
Abstract: Current research is probing transport on ever smaller scales. Modeling of the electromagnetic interaction with nanoparticles or small collections of dipoles and its associated the energy transport and nonequilibrium characteristics requires a deta ...

40. Internal Resistance of Voltage Source Using the FDTD Technique
Topic: Electromagnetics
Published: 11/2/2009
Author: Ae-kyoung Lee
Abstract: The introduction of the internal resistance of a voltage source is a very effective method for analyzing the electromagnetic characteristics of antennas and microstrip devices using the FDTD technique. However, some trial and error could be accompani ...

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